Networked Switched Control Systems Research Articles

Dynamic event‐triggered sliding mode control of networked switched systems with imperfect transmissions

AbstractAs a significant type of dynamic systems, switched systems have been successfully applied to the construction of many engineering fields. Recently, the studies of networked switched control systems have received a lot of attention. However, the intervention of the network often causes the delay or packet loss during data transmission, resulting in incomplete data transmission. The paper studies a sliding mode observer design for above‐mentioned systems with external disturbance under an imperfect transmission communication link. By constructing a dynamic event generator, a dynamic event‐triggered mechanism between the event‐generator and controller is developed to save additional network bandwidth and improve system performance. A desirable sliding surface function is built to solve the complexity of system analysis problems caused by network‐induced delay and packet‐dropout‐induced imperfect transmission. Then, a corresponding event‐based integral‐type sliding mode observer is constructed to estimate inaccessible system states, guaranteeing the reachability of the sliding surface. Based on the augmented system dynamics, sufficient conditions are derived to guarantee exponent stability with a weighted ‐ performance level. Finally, two simulations are presented to demonstrate the feasibility and effectiveness of the proposed method.

Fault detection filtering for nonlinear switched systems via event-triggered communication approach

This paper considers the fault detection problem for networked switched control systems subject to repeated scalar nonlinearities and stochastic disturbance under an event-triggered scheme. A nonlinear fault detection filter is proposed to generate the residual signal and detect system faults, and an event-triggered strategy is applied to limit signal transmission. Sufficient conditions to guarantee an event-based residual system is mean-square exponentially stable with the desired performance are obtained using average dwell time stability theory and a positive diagonally dominant Lyapunov functional approach. The corresponding fault detection mechanism parameters are calculated using the linearization technique. The event-triggered fault-detection filter and controller coordinated design are extended and then applied to cognitive radio networks. Two examples are provided to verify the proposed new design method.

Finite-Time Stability for Networked Switched Control Systems with Not Finite-Time Stable Subsystems

In this paper, we studied finite-time stability for a class of Networked Switched Control Systems (NSCSs) with time-delays and uncertainties and its subsystems are not finite-time stable. At the beginning, the concepts of Average Dwell Time (ADT), finite-time stability and uniformly finite-time stability of NSCSs are given by 3 definitions. Then sufficient conditions are given under which networked switched linear control systems with subsystems that are not finite-time stable can changed to be finite-time stable. Finally, numerical examples are employed to verify the efficiency of the proposed methods.

Asynchronous Finite-Time H¥ Control for Networked Switched Control Systems via Mode-Dependent Dynamic State-Feedback

Asynchronous Finite-Time H¥ Control for Networked Switched Control Systems via Mode-Dependent Dynamic State-Feedback

Finite-time control for networked switched linear systems with an event-driven communication approach

ABSTRACTThis paper is concerned with the network-based finite-time controller design problems for a class of switched linear systems with sampled-data control approach, the quantisation errors are also taken into account. A novel event-driven communication scheme is developed which can be seen as the extension of time-driven communication cases. By invoking an input-delay approach, the networked switched control systems are firstly modelled as a kind of switched time-delay systems with time-varying delays, upon which a set of mode-dependent controllers are then designed such that the reformulated switched system with time-varying delays is finite-time bounded and has a guaranteed noise attenuation performance in the finite-time sense. Moreover, a co-design algorithm of mode-dependent control and event-driven communication is presented to find the optimal event-driven strategy for reducing transmission loads. Finally, a numerical example and an application to F-18 aircraft are provided to demonstrate the effectiveness and the advantages of the developed results.